I keep my legs still, and let the paralysis crawl up them while moving my arms around some (i.e. playing with my nipples...it helps to pass the time). Then the SP will be at your waist, and you may already have vibrations by then. Then stop moving your arms since you are already half way there.

That, and I also have trouble falling asleep. It's normal for me to go to sleep just after 10PM and not fall asleep until after midnight.